US3790654A - Extrusion method for forming thinwalled honeycomb structures - Google Patents
Extrusion method for forming thinwalled honeycomb structures Download PDFInfo
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- US3790654A US3790654A US00196986A US3790654DA US3790654A US 3790654 A US3790654 A US 3790654A US 00196986 A US00196986 A US 00196986A US 3790654D A US3790654D A US 3790654DA US 3790654 A US3790654 A US 3790654A
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- 238000001125 extrusion Methods 0.000 title abstract description 19
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/04—Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/26—Extrusion dies
- B28B3/269—For multi-channeled structures, e.g. honeycomb structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H2200/00—Specific machining processes or workpieces
- B23H2200/30—Specific machining processes or workpieces for making honeycomb structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
Definitions
- Extrudable material is fed to said die under pressure wherein the extrudable material flows longitudinally through the feed openings in the inlet face of the die and is directed thereby to the interconnected discharge slots communicating with the outlet face, wherein a portion of the material flows laterally within such slots to form a continuous mass before being discharged longitudinally therefrom to thereby form a thin-walled structure having a multiplicity of open passages extending therethrough.
- the longitudinally discharged mass is rigidified to prevent deformation of said passages.
- This invention pertains to the art of manufacturing thinwalled honeycomb structures from extrudable material such as ceramic batches, molten glasses, plastics, molten metals, and similar materials which have the property of being able to flow or plastically deform during extrusion while being able to become suificiently rigid immediately thereafter so as to maintain structural integrity. More particularly, the present invention relates to an improved extrusion die structure and method for forming uniform thinwalled cellular or honeycomb type articles having a plurality of openings or passages extending therethrough with wall portions between such openings having a preferred thickness of between about .002" and .050", so as to provide open frontal areas of about 75% or greater.
- a further U.S. prior art Pat. No. 3,406,435 discloses apparatus for manufacturing ceramic elements having a honeycomb structures for use in regenerators, recuperawalled sleeve members having extensions with closed end portions are connected to an extruder cylinder. The material to be extruded is forced through the elongated sleeve members and outwardly through orifices formed in side walls of the extensions attached thereto. The sleeve extensions are spaced from each other to provide channels into a honeycomb structure.
- Pat. No. 3,406,435 appears to overcome some of the problems associated with a typical die assembly such as shown in U.S. Pat. No. 1,849,431 wherein a spider or cross-head positions a plurality of rods, one for each core or cell in the article to be formed; the
- the present invention has overcome the problem of suspending a plurality of core members in predetermined spaced apart relationship, which has plagued the prior art, by providing a completely unique manner of forming an extrusion die with uniform discharge slots which are maintained in substantially rigid orientation during extrusion.
- the present invention is directed to an improved extrusion die structure for forming thin-walled cellular or honeycomb structures and to the method of forming such structures.
- Cellular or honeycomb structures refer to any structure having a plurality of openings or passages of any desired size or shape extending therethrough, whereas thin Walls refers to the walls between such openings or passages having a thickness of between about .002" and .050.
- the extrusion die per se is preferably made of a unitary construction having a plurality of interconnected discharge slots provided with uniform openings in the outlet face of the die.
- the discharge slots may either be uniformly spaced-apart or formed with variable spacing therebetween if desired, and the gridwork formed in the outlet face by such slots may be of virtually any geometric pattern such as square, rectangular, triangular, hexagonal and circular.
- a plurality of feed openings or passageways communicate between the inlet face of the die and inner root portions of the discharge slots to deliver extrudable material from an extrusion chamber to the discharge slots.
- the feed passageways may be in the form of slots or holes which intersect selected portions of the gridwork formed by the interconnecting discharge slots.
- the discharge slots which are of a predetermined size and orientation to form a desired thin-walled structure, extend inwardly from the outlet face a distance suflicient to insure the lateral filling of all outlet portions of such slots with the extrudable material delivered thereto by the feed holes, prior to such material being discharged from the die.
- the discharge slots are preferably formed with a greater resistance to batch flow than that provided by the feed passageways.
- the resistance to flow in the slots need not necessarilybe greater than that in the feed passageways, but must be sufficient to insure that the batch material will flow laterally together within the depth of the discharge slots and prior to discharge therefrom so as to form a continuous mass of interconnected batch prior to such discharge.
- the root portions of such discharge slots may be contoured to provide ease in lateral flow.
- the die body is preferably produced as a unitary construction so as to provide the required strength and rigidity to withstand extrusion pressures without failure or deleterious deformation
- the body per se may be formed. either from a single piece of material or from a plurality of pro-formed sheets which are subsequently fused or bonded together to form a unitary body. However, where the extrusion pressures are not excessive, such sheets may merely be clamped together.
- a collar member may be provided about the die body to form a bounding passage about the periphery of the outlet face, so as to provide for an integral shell about the honeycomb structure.
- a plurality of longitudinally-extending feed openings are formed in the die assembly to feed batch material to the annular passage, and restriction means may be provided to vary the resistance to flow through such passage.
- a further object of the invention has been to provide an improved method of forming thin-walled honeycomb articles by delivering extrudable material longitudinally through feed passages to a plurality of interconnected discharge slots forming a gridwork, impeding the flow through such slots and laterally flowing a portion of the material delivered to such slots to form a unitary gridlike mass, and then longitudinally discharging said mass to form a honeycomb structure.
- FIG. 1 is a top plan view of a die assembly embodying the present invention.
- FIG. 2 is an elevational view in section taken along line 22 of FIG. 1.
- FIG. 3 is a bottom plan view of the die assembly shown in FIG. 1.
- FIG. 4 is a greatly enlarged fragmental top plan view of the embodiment shown in FIG. 1 illustrating the orientation between the feed openings and discharge slots.
- FIG. 6 is a top plan view of an additional embodiment.
- FIGS. 7, 8 and 9 are fragmental cross-sectional views in elevation illustrating various forms of discharge slots which may be utilized with the disclosed die structures.
- a die assembly 10 comprising a die body 12 and a collar 14.
- the die body has an inlet face 16 provided with a plurality of openings or feed passageways 18 for feeding batch material to the e ral flow within the slots between the intersections thereof with adjacent feed holes 18, so as to completely fill the lateral extent of the slots with batch material prior to the discharge thereof from the slots, even though a portion of the batch material directly below the feed holes longitudinally flows directly through such discharge slots.
- the discharge slots 24 extend inwardly a sutficient distance to insure the filling of at least the outlet end of the slots through lateral flow of the batch material prior to the discharge thereof from the gridwork formed by such slots.
- the resistance to batch flow necessary for encouraging lateral fiow will of course not only be affected by the viscosity of the extrudable material, but also by the depth of the slots through which such material must travel during its obtainment of lateral flow.
- the resistance to batch flow in the slots should be at least equal to that in the feed holes, however, satisfactory results have been obtained by providing the slots with from about .8 to 6 times the resistance to flow through the feed passageways.
- collar member 14 may have an adjustable insert 32 threadably attached thereto.
- the lower inner periphery of insert 32 forms an annular orifice 34 with the outer periphery of outlet face 22.
- Feed passages 20 supply batch material to the annular orifice 34 to provide an integral casing or shell about the honeycomb matrix formed by the gridwork of discharge slots 24.
- the adjustable insert 32 has an upper tapered surface 36 which cooperates with outwardly tapered surface 38 formed on die body 12, to vary the resistance to the flow therebetween of batch being fed to the annular orifice 34. That is, the resistance to the flow of batch material being delivered to the annular orifice 34 may be varied by threadably adjusting the position of insert 32 within collar 14.
- tapered surfaces 36 and 38 provide a means for varying the resistance to flow, but also permit the annular ring of feed passages 20 to be outwardly ofiset and thereby permit the positionment of a full complement of feed passageways 18 for uniformly feeding batch material to the gridwork of interconnected slots 24.
- the core pins 28 formed by slots 24 may be of a square configuration as matrix of a honeycomb structure, as well as a plurality of annularly arranged feed passages 20 for feeding batch material to an outer casing or shell for such structure. If desired, a circular feed slot could be substituted for the feed passages 20, and the resulting central die portion held in position by suitable pins or the like.
- the die body 12 has an outlet face 22, opposite inlet face 16, which is provided with a plurality of interconnected discharge slots 24.
- the interconnected discharge slots 24 form a gridwork through which the batch material is extruded to form the matrix of a coherent honeycomb structure.
- Each discharge slot 24 is provided with a root portion 26 at its inward-most end, and the feed passageways 18 communicate with selected areas of such root portions.
- the feed passageways 18 may be in the form of holes which communicate with alternate intersecting slots formed in the discharge gridwork, such that the feed holes intersect one set of diagonal corners of core pins 28 formed by the intersecting slots.
- the feed holes 18 have a taper 30 at their lower ends which intersect the root portions 26 of slots 24.
- the relatively large area of intersection as shown in FIG. 4 helps to provide for latshown in FIG. 5.
- each intersecting slot 24 may be provided with a feed hole 18 as shown in FIG. 5, rather than at every other intersection as shown in the embodiment of FIG. 4.
- the gridwork formed by the intersecting slots may be of virtually any desired pattern, including such geometric shapes as round, square, oblong, triangular or hexangular.
- Honeycomb structures for use as heat exchangers, for instance, may be in the form of long thin passages formed by a plurality of thin parallel walls having only periodic perpendicular webbing walls for maintaining the spacing between such parallel wa s.
- the discharge slots 24' may be fed by feed passageways 18 in the form of longitudinal slots, rather than by circular holes a shown in the embodiments of FIGS. 4 and 5. It will be apparent, however, that the feed slots 18 formed in the inlet face of the die body shown in FIG. 6 must be out of register with the discharge slots 24 formed in the outlet face, so that the base of the core pins 28 formed by the intersecting slots is not weakened excessively. Accordingly, it is felt that although feed slots may be uti lized if desired, feed holes have an advantage over feed slots since a more rigid structure is usually obtained. As previously mentioned, the feed holes need only to be located such that the feed to the slots is uniform, since the extrudable material must flow laterally from the feed holes to completely fill the slots in the die prior to dis? charge from the outlet face.
- Slot' 24a is shown in FIG. 7 as being equally formed in two opposing sheets 40, in such a manner so that the root. portion..26 has a larger cross section than the ame cross section of the discharge opening in outlet face 22, and the opposed sidewalls gradually taper inwardly from the, root portion to the outlet face.
- FIG. 8 illustrates a slot 241: being equally formed in opposingsheets 40 and having an enlarged root portion 26 as compared with the discharge opening in outlet face 22. However, the opposed sidewalls of the slot 24b-initially taper inwardly from the 'root toward the outlet face but have a parallelsection adjacent such outlet face.
- FIG. 9 illustrates a slot configuration 24c wherein one wall of the slot is formed by an uncut wall of a sheet 40 whereas the opposite wall is formed with a taper and is formed in an adjacent sheet 40. If desired, the slot 240 could be provided with a parallel opposing wall portion adjacent the outlet face 22.
- any of the slots 24, 24a, 24b, or 240 or their associated feed holes could be formed within a unitary or laminated die body by means of chemical machining a disclosed in US. Pat. Nos. 2,628,160, 2,684,911, and 2,971,853. Such chemical machining would also be useful in forming a plurality of intersecting circular discharge slots.
- the particular material utilized to produce the die body will of course be predicated upon the material to be extruded therethrough.
- the dies may be manufactured from machinable metals such as aluminum and cold rolled steel, or vitreous and ceramic materials such as glas ceramics, tungsten carbide and alumina.
- some of the core pins 28 about the periphery of the outlet face 22 are of a reduced size due to the circular configuration of annular orifice 34.
- all of the core pins may then be formed of an equal size.
- the orifice 34 is formed with a square opening, and the outlet face is provided with a gridwork having a square slot pattern, all of the core pins may be of equal size.
- the orifice 34 i provided with a hexagonal opening and a triangular slot pattern is formed in the outlet face of the die, all of the core pins will be of equal size since the gridwork will coincide with the casing configuration.
- a 5" diameter die having an overall thickness of 1.2" was made from cold rolled steel and provided with a surrounding collar member.
- a gridwork of discharge slots was cut into the outlet face thereof with a width of .010 inch and a depth of .150 inch forming square core pins having a width of .065 inch.
- Feed holes having a diameter of .081 inch were drilled into the inlet face of the die to a depth of 1.05 inches so as to intersect the discharge slots adjacent every other intersection of the grid work, thus producing 89 feed holes per square inch of cross-sectional area.
- the slots had a relative resistance to flow of about 4 times that produced by the feed holes.
- a circle of feed holes for the shell or outer casing were drilled with a diameter of .070 inch and a depth of .900 inch to form a total of 72 feed openings for feeding batch to the annular orifice formed between the die body and collar member.
- a ceramic batch material comprising about 58 parts by weight of pulverized EPK Florida Kaolin, obtainable from Whittaker, Clark and Daniels of New York, -N.Y., about 20 parts by weight of Texas white talc #2619, obtainable from Hammel & Gillespie, Inc. of White Plainfield, N.J., about 22 parts by weight of T-61 alumina produced by Aluminum Corp. of America, and about 28 parts by weight of water, with suitable extruding aids for bonding and plasticizing such as methyl cellulose, was fed to the die under a pressure of about 1900 psi. atan extrusion rate of about 45 inches per minute.
- the batch material flowed longitudinally through the feed passages and was delivered to the interconnected discharge slots forming the square-patterned gridwork, whereupon a portion of the material flowed laterally within the gridwork to form a continuous grid-like mass therewithin.
- Batch was simultaneously fed to the annular orifice surrounding the grid-like mass, and then the interconnected mass was longitudinally discharged simultaneously from said slots and said orifice to form a honeycomb structure with an integral casing.
- the resulting structure had 179 openings per square inch with Wall members therebetween of .010 inch, thus producing an open frontal area of about 75%. Both the cells and the bounding wall members were uniform throughout their cross-sectional and longitudinal extents. It will be appreciated, that after the ceramic structure was dried and fired, the resulting wall members had a thickness of even less than .010 inch thus resulting in a truly thin-walled honeycomb structure having both uniform wall portions and cells.
- a method of forming a honeycomb structure from an extrudable material which comprises, flowing an extrudable material longitudinally through a plurality of feed passageways, delivering such flow of material from said feed passageways directly to intersecting portions of a gridwork of interconnected discharge slots of substantially uniform width, impeding the longitudinal flow through such slots for inducing lateral flow therewithin, laterally flowing within said discharge slots a portion of the material delivered to such slots to form a unitary grid-like mass therewithin, then longitudinally discharging said 7 mass from said slots to form a continuous thin-walled honeycomb structure, and rigidifying said honeycomb mass to provide a rigid structure having a plurality of passages extending therethrough separated by said thin walls.
- a method of forming honeycomb structures as defined in claim 1 including the step of simultaneously delivering extrudable material through an orifice surrounding the discharge of said unitary grid-like mass to form an integral casing for said honeycomb structure, and varying the resistance to flow through such orifice.
- a method of extruding honeycomb structures from extrudable batch material which comprises, longitudinally directing extrudable batch material under pressure through a plurality of delivery passageways, delivering such material from said passageways directly to inner intersecting portions of a plurality of interconnected slots forming a discharge gridwork, simultaneously flowing such longitudinally delivered material in both a lateral and longitudinal direction within said discharge slots to form a coherent gridWork-li'ke mass therewithin, then longitudinally discharging said gridwork-like mass from said slots while simultaneously maintaining opposed surfaces of said gridwork in spaced relation to form a honeycomb structure having a plurality of passages extending therethrough, and rigidifying said honeycomb structure to mainunitary casing thereabout.
Abstract
Method for forming thin-walled honeycomb structures is provided in the use of an extrusion die having an outlet face provided with a gridwork of interconnected discharge slots and an inlet face provided with a plurality of feed openings extending partially through said die in communication with said discharge slots. Extrudable material is fed to said die under pressure wherein the extrudable material flows longitudinally through the feed opening in the inlet face of the die and is directed thereby to the interconnected discharge slots communicating with the outlet face, wherein a portion of the material flows laterally within such slots to form a continuous mass before being discharged longitudinally therefor to thereby form a thin-walled structure having a multiplicity of open passages extending throughout. The longitudinally discharged mass is rigidified to prevent deformation of said passages.
Description
R. D. BAGLEY Feb. 5, 1974 EXTHUSION METHOD FOR FORMING THIN-WALLED HONEYCOMB STRUCTURES 5 Sheets-Sheet 1 Filed Nov. 9, 1971 INVENTOR.
v w w B D m M. R W
' ATTORNEY Feb. 5, 1974 BAGLEY 3,790,654
EXTRUSION METHOD FOR FORMING THIN-WALLED HONEYCOMB STRUCTURES Filed Nov. 9, 1971 5 Sheets-Sheet z nuuuuunununuunuu u unuuuuunnnnuuunu uunuuunuuunnmunun @uuuuuuuuuuu Hnn uunuuunuuuu F 4 INVENTOR.
Rodney D. Bag/ey ATTORNEY 3 Sheets-Sheet 3 INVENTOR. Rodney D. Bag/ey s BY 22 24c W I ATTORNEY EXTRUSION METHOD FOR FORMING THIN-WALLED HONEYCOMB STRUCTURES Feb. 5, 1974 Filed Nov. 9, 1971 22 2 [-79 7 Fig.8 Fig.9
United States Patent 3,790,654 EXTRUSION METHOD FOR FORMING THIN- WALLED HONEYCOMB STRUCTURES Rodney D. Bagley, Corning, N.Y., assignor to Corning Glass Works, Corning, N.Y. Filed Nov. 9, 1971, Ser. No. 196,986 Int. Cl. 1329f 3/00 U.S. Cl. 264-177 4 Claims ABSTRACT OF THE DISCLOSURE Method for forming thin-walled honeycomb structures is provided in the use of an extrusion die having an outlet face provided with a gridwork of interconnected discharge slots and an inlet face provided with a plurality of feed openings extending partially through said die in communication with said discharge slots. Extrudable material is fed to said die under pressure wherein the extrudable material flows longitudinally through the feed openings in the inlet face of the die and is directed thereby to the interconnected discharge slots communicating with the outlet face, wherein a portion of the material flows laterally within such slots to form a continuous mass before being discharged longitudinally therefrom to thereby form a thin-walled structure having a multiplicity of open passages extending therethrough. The longitudinally discharged mass is rigidified to prevent deformation of said passages.
BACKGROUND OF THE INVENTION This invention pertains to the art of manufacturing thinwalled honeycomb structures from extrudable material such as ceramic batches, molten glasses, plastics, molten metals, and similar materials which have the property of being able to flow or plastically deform during extrusion while being able to become suificiently rigid immediately thereafter so as to maintain structural integrity. More particularly, the present invention relates to an improved extrusion die structure and method for forming uniform thinwalled cellular or honeycomb type articles having a plurality of openings or passages extending therethrough with wall portions between such openings having a preferred thickness of between about .002" and .050", so as to provide open frontal areas of about 75% or greater.
As pointed out by the prior art in U.S. Pat. No. 3,112,184, it has been known to make thin-walled ceramic honeycomb structures for use in regenerators, recuperators, radiators, catalyst carriers, filters, heat exchangers, and the like by coating a carrier with a ceramic slurry and binder mix and flowing crimped and flat sheets of such coated carrier together to make a cellular type structure. Although suitable products may be formed in this manner, the prior art technique has not been completely saisfactory due to the fact that cell shape is limited and wall thicknesses may not be uniform, and further the process is relatively slow and requires costly materials.
A further U.S. prior art Pat. No. 3,406,435 discloses apparatus for manufacturing ceramic elements having a honeycomb structures for use in regenerators, recuperawalled sleeve members having extensions with closed end portions are connected to an extruder cylinder. The material to be extruded is forced through the elongated sleeve members and outwardly through orifices formed in side walls of the extensions attached thereto. The sleeve extensions are spaced from each other to provide channels into a honeycomb structure.
Although the structure of Pat. No. 3,406,435 appears to overcome some of the problems associated with a typical die assembly such as shown in U.S. Pat. No. 1,849,431 wherein a spider or cross-head positions a plurality of rods, one for each core or cell in the article to be formed; the
in which the material from the orifices become reshaped 6 3,790,654 Patented Feb. 5, 1974 apparatus is not completely satisfactory for producing honeycomb structures having a multiplicity of sized cells or openings, since not only would it be virtually impossible to construct due to the number of sleeves required, but also the unsupported extensions on such sleeves would have a tendency to distort under extrusion pressures. In addition, as shown in the patent drawings, truly thinwalled structures are not obtainable with such a structure. Further, any variation in the spaces between the extensions will tend to result in a curved extrusion or rippling of the formed article, since a thicker section of the wall will extrude more rapidly than a thin section.
Accordingly, the present invention has overcome the problem of suspending a plurality of core members in predetermined spaced apart relationship, which has plagued the prior art, by providing a completely unique manner of forming an extrusion die with uniform discharge slots which are maintained in substantially rigid orientation during extrusion.
SUMMARY OF THE INVENTION In its very simplest form, the present invention is directed to an improved extrusion die structure for forming thin-walled cellular or honeycomb structures and to the method of forming such structures. Cellular or honeycomb structures refer to any structure having a plurality of openings or passages of any desired size or shape extending therethrough, whereas thin Walls refers to the walls between such openings or passages having a thickness of between about .002" and .050. The extrusion die per se, is preferably made of a unitary construction having a plurality of interconnected discharge slots provided with uniform openings in the outlet face of the die. The discharge slots may either be uniformly spaced-apart or formed with variable spacing therebetween if desired, and the gridwork formed in the outlet face by such slots may be of virtually any geometric pattern such as square, rectangular, triangular, hexagonal and circular. A plurality of feed openings or passageways communicate between the inlet face of the die and inner root portions of the discharge slots to deliver extrudable material from an extrusion chamber to the discharge slots. The feed passageways may be in the form of slots or holes which intersect selected portions of the gridwork formed by the interconnecting discharge slots.
The discharge slots, which are of a predetermined size and orientation to form a desired thin-walled structure, extend inwardly from the outlet face a distance suflicient to insure the lateral filling of all outlet portions of such slots with the extrudable material delivered thereto by the feed holes, prior to such material being discharged from the die. In order to facilitate such lateral flow of batch material within the discharge slots so as to provide a coherent mass of such material within the gridwork formed by the interconnected discharge slots, the discharge slots are preferably formed with a greater resistance to batch flow than that provided by the feed passageways. However, the resistance to flow in the slots need not necessarilybe greater than that in the feed passageways, but must be sufficient to insure that the batch material will flow laterally together within the depth of the discharge slots and prior to discharge therefrom so as to form a continuous mass of interconnected batch prior to such discharge. Further, the root portions of such discharge slots may be contoured to provide ease in lateral flow.
Although the die body is preferably produced as a unitary construction so as to provide the required strength and rigidity to withstand extrusion pressures without failure or deleterious deformation, the body per se may be formed. either from a single piece of material or from a plurality of pro-formed sheets which are subsequently fused or bonded together to form a unitary body. However, where the extrusion pressures are not excessive, such sheets may merely be clamped together. A collar member may be provided about the die body to form a bounding passage about the periphery of the outlet face, so as to provide for an integral shell about the honeycomb structure. A plurality of longitudinally-extending feed openings are formed in the die assembly to feed batch material to the annular passage, and restriction means may be provided to vary the resistance to flow through such passage.
It thus has been an object of the present invention to provide a novel relatively easily manufacturable extrusion die structure for forming thinwalled honeycomb articles having a plurality of openings per cross-sectional area, wherein said die structure is substantially rigid so to maintain dimensional stability during extrusion and thereby provide uniform thin walls between such openmgs.
A further object of the invention has been to provide an improved method of forming thin-walled honeycomb articles by delivering extrudable material longitudinally through feed passages to a plurality of interconnected discharge slots forming a gridwork, impeding the flow through such slots and laterally flowing a portion of the material delivered to such slots to form a unitary gridlike mass, and then longitudinally discharging said mass to form a honeycomb structure.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of a die assembly embodying the present invention.
FIG. 2 is an elevational view in section taken along line 22 of FIG. 1.
FIG. 3 is a bottom plan view of the die assembly shown in FIG. 1.
FIG. 4 is a greatly enlarged fragmental top plan view of the embodiment shown in FIG. 1 illustrating the orientation between the feed openings and discharge slots.
FIG. 5 is a top plan view of a further embodiment.
FIG. 6 is a top plan view of an additional embodiment.
FIGS. 7, 8 and 9 are fragmental cross-sectional views in elevation illustrating various forms of discharge slots which may be utilized with the disclosed die structures.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, and particularly FIGS. 1 through 4 inclusive, a die assembly 10 is shown comprising a die body 12 and a collar 14. The die body has an inlet face 16 provided with a plurality of openings or feed passageways 18 for feeding batch material to the e ral flow within the slots between the intersections thereof with adjacent feed holes 18, so as to completely fill the lateral extent of the slots with batch material prior to the discharge thereof from the slots, even though a portion of the batch material directly below the feed holes longitudinally flows directly through such discharge slots. The discharge slots 24 extend inwardly a sutficient distance to insure the filling of at least the outlet end of the slots through lateral flow of the batch material prior to the discharge thereof from the gridwork formed by such slots. The resistance to batch flow necessary for encouraging lateral fiow will of course not only be affected by the viscosity of the extrudable material, but also by the depth of the slots through which such material must travel during its obtainment of lateral flow. Preferably the resistance to batch flow in the slots should be at least equal to that in the feed holes, however, satisfactory results have been obtained by providing the slots with from about .8 to 6 times the resistance to flow through the feed passageways.
As shown particularly in FIG. 2, collar member 14 may have an adjustable insert 32 threadably attached thereto. The lower inner periphery of insert 32 forms an annular orifice 34 with the outer periphery of outlet face 22. Feed passages 20 supply batch material to the annular orifice 34 to provide an integral casing or shell about the honeycomb matrix formed by the gridwork of discharge slots 24. The adjustable insert 32 has an upper tapered surface 36 which cooperates with outwardly tapered surface 38 formed on die body 12, to vary the resistance to the flow therebetween of batch being fed to the annular orifice 34. That is, the resistance to the flow of batch material being delivered to the annular orifice 34 may be varied by threadably adjusting the position of insert 32 within collar 14. Not only do the tapered surfaces 36 and 38 provide a means for varying the resistance to flow, but also permit the annular ring of feed passages 20 to be outwardly ofiset and thereby permit the positionment of a full complement of feed passageways 18 for uniformly feeding batch material to the gridwork of interconnected slots 24.
Although a rectangular gridwork is shown being formed by discharge slots 24 in FIGS. 3 and 4, the core pins 28 formed by slots 24 may be of a square configuration as matrix of a honeycomb structure, as well as a plurality of annularly arranged feed passages 20 for feeding batch material to an outer casing or shell for such structure. If desired, a circular feed slot could be substituted for the feed passages 20, and the resulting central die portion held in position by suitable pins or the like.
The die body 12 has an outlet face 22, opposite inlet face 16, which is provided with a plurality of interconnected discharge slots 24. As shown in FIG. 3, the interconnected discharge slots 24 form a gridwork through which the batch material is extruded to form the matrix of a coherent honeycomb structure. Each discharge slot 24 is provided with a root portion 26 at its inward-most end, and the feed passageways 18 communicate with selected areas of such root portions. As shown in FIG. 4, the feed passageways 18 may be in the form of holes which communicate with alternate intersecting slots formed in the discharge gridwork, such that the feed holes intersect one set of diagonal corners of core pins 28 formed by the intersecting slots.
As shown particularly in FIG. 2, the feed holes 18 have a taper 30 at their lower ends which intersect the root portions 26 of slots 24. The relatively large area of intersection as shown in FIG. 4 helps to provide for latshown in FIG. 5. Further, if desired each intersecting slot 24 may be provided with a feed hole 18 as shown in FIG. 5, rather than at every other intersection as shown in the embodiment of FIG. 4. The gridwork formed by the intersecting slots may be of virtually any desired pattern, including such geometric shapes as round, square, oblong, triangular or hexangular. Honeycomb structures for use as heat exchangers, for instance, may be in the form of long thin passages formed by a plurality of thin parallel walls having only periodic perpendicular webbing walls for maintaining the spacing between such parallel wa s.
As shown in the additional embodiment of FIG. 6, the discharge slots 24'may be fed by feed passageways 18 in the form of longitudinal slots, rather than by circular holes a shown in the embodiments of FIGS. 4 and 5. It will be apparent, however, that the feed slots 18 formed in the inlet face of the die body shown in FIG. 6 must be out of register with the discharge slots 24 formed in the outlet face, so that the base of the core pins 28 formed by the intersecting slots is not weakened excessively. Accordingly, it is felt that although feed slots may be uti lized if desired, feed holes have an advantage over feed slots since a more rigid structure is usually obtained. As previously mentioned, the feed holes need only to be located such that the feed to the slots is uniform, since the extrudable material must flow laterally from the feed holes to completely fill the slots in the die prior to dis? charge from the outlet face.
Referring now to FIGS. 7, 8 and 9, various forms of slot configurations are shown which may be utilized with before or afterbonding. Slot' 24a, is shown in FIG. 7 as being equally formed in two opposing sheets 40, in such a manner so that the root. portion..26 has a larger cross section than the ame cross section of the discharge opening in outlet face 22, and the opposed sidewalls gradually taper inwardly from the, root portion to the outlet face. i
- ;In a like manner, FIG. 8 illustrates a slot 241: being equally formed in opposingsheets 40 and having an enlarged root portion 26 as compared with the discharge opening in outlet face 22. However, the opposed sidewalls of the slot 24b-initially taper inwardly from the 'root toward the outlet face but have a parallelsection adjacent such outlet face. FIG. 9 illustrates a slot configuration 24c wherein one wall of the slot is formed by an uncut wall of a sheet 40 whereas the opposite wall is formed with a taper and is formed in an adjacent sheet 40. If desired, the slot 240 could be provided with a parallel opposing wall portion adjacent the outlet face 22. Further, any of the slots 24, 24a, 24b, or 240 or their associated feed holes could be formed within a unitary or laminated die body by means of chemical machining a disclosed in US. Pat. Nos. 2,628,160, 2,684,911, and 2,971,853. Such chemical machining would also be useful in forming a plurality of intersecting circular discharge slots.
The particular material utilized to produce the die body will of course be predicated upon the material to be extruded therethrough. The dies, for example, may be manufactured from machinable metals such as aluminum and cold rolled steel, or vitreous and ceramic materials such as glas ceramics, tungsten carbide and alumina. Although the utilization of slots having contoured roots for facilitating the lateral flow of batch material therewithin has been disclosed, it has been found that straight-sides slots 24 as shown in FIG. 2 are very adequate for extruding ceramic batch materials.
A will be noted in FIG. 3, some of the core pins 28 about the periphery of the outlet face 22 are of a reduced size due to the circular configuration of annular orifice 34. However, by shaping the outside casing produced by orifice 34 so that wall portions thereof are parallel to the slots formed in the outlet face, all of the core pins may then be formed of an equal size. For example, if the orifice 34 is formed with a square opening, and the outlet face is provided with a gridwork having a square slot pattern, all of the core pins may be of equal size. Further, if the orifice 34 i provided with a hexagonal opening and a triangular slot pattern is formed in the outlet face of the die, all of the core pins will be of equal size since the gridwork will coincide with the casing configuration.
Although the feed holes 18 are usually uniformly drilled within the die body to intersect with selected areas of the slots forming the discharge gridwork, the diameters of the various feed holes may be varied in selected areas to provide greater or less feed as may be necessary due to the particular con-figuration of the extruded cellular honeycomb article. Even though the utilization of longitudinally extending feed holes is preferred, it may be desirable to slant feed holes in the area of the collar in order to provide complete batch filling adjacent the casing. Further, although the invention is primarily useful in overcoming the problems of forming thin-walled honeycomb structures having from about 60 to 600 openings per square inch of cross sectional area, it should be ap- 6 preciated that it may also be used in making thick walls if desired. It will be 'readily apparent to those skilled in the art that the particular size and shape of individual orifices embodying the present invention will vary with the physical properties of the material being extruded, and although the present invention is not directed to extrudable batch materials per se, but rather to a method and apparatus for extruding honeycomb articles, the following specific example is given merely as being one illustration of the invention.
A 5" diameter die having an overall thickness of 1.2" was made from cold rolled steel and provided with a surrounding collar member. A gridwork of discharge slots was cut into the outlet face thereof with a width of .010 inch and a depth of .150 inch forming square core pins having a width of .065 inch. Feed holes having a diameter of .081 inch were drilled into the inlet face of the die to a depth of 1.05 inches so as to intersect the discharge slots adjacent every other intersection of the grid work, thus producing 89 feed holes per square inch of cross-sectional area. The slots had a relative resistance to flow of about 4 times that produced by the feed holes. Also a circle of feed holes for the shell or outer casing were drilled with a diameter of .070 inch and a depth of .900 inch to form a total of 72 feed openings for feeding batch to the annular orifice formed between the die body and collar member.
A ceramic batch material comprising about 58 parts by weight of pulverized EPK Florida Kaolin, obtainable from Whittaker, Clark and Daniels of New York, -N.Y., about 20 parts by weight of Texas white talc #2619, obtainable from Hammel & Gillespie, Inc. of White Plainfield, N.J., about 22 parts by weight of T-61 alumina produced by Aluminum Corp. of America, and about 28 parts by weight of water, with suitable extruding aids for bonding and plasticizing such as methyl cellulose, was fed to the die under a pressure of about 1900 psi. atan extrusion rate of about 45 inches per minute. The batch material flowed longitudinally through the feed passages and was delivered to the interconnected discharge slots forming the square-patterned gridwork, whereupon a portion of the material flowed laterally within the gridwork to form a continuous grid-like mass therewithin. Batch was simultaneously fed to the annular orifice surrounding the grid-like mass, and then the interconnected mass was longitudinally discharged simultaneously from said slots and said orifice to form a honeycomb structure with an integral casing. The resulting structure had 179 openings per square inch with Wall members therebetween of .010 inch, thus producing an open frontal area of about 75%. Both the cells and the bounding wall members were uniform throughout their cross-sectional and longitudinal extents. It will be appreciated, that after the ceramic structure was dried and fired, the resulting wall members had a thickness of even less than .010 inch thus resulting in a truly thin-walled honeycomb structure having both uniform wall portions and cells.
Although the now preferred embodiments of my invention have been disclosed, it will be apparent to those skilled in the art that various changes and modifications may 'be made thereto without departing from the spirt and scope thereof as defined in the appended claims.
What is claimed is:
1. A method of forming a honeycomb structure from an extrudable material which comprises, flowing an extrudable material longitudinally through a plurality of feed passageways, delivering such flow of material from said feed passageways directly to intersecting portions of a gridwork of interconnected discharge slots of substantially uniform width, impeding the longitudinal flow through such slots for inducing lateral flow therewithin, laterally flowing within said discharge slots a portion of the material delivered to such slots to form a unitary grid-like mass therewithin, then longitudinally discharging said 7 mass from said slots to form a continuous thin-walled honeycomb structure, and rigidifying said honeycomb mass to provide a rigid structure having a plurality of passages extending therethrough separated by said thin walls.
2. A method of forming honeycomb structures as defined in claim 1 including the step of simultaneously delivering extrudable material through an orifice surrounding the discharge of said unitary grid-like mass to form an integral casing for said honeycomb structure, and varying the resistance to flow through such orifice.
3. A method of extruding honeycomb structures from extrudable batch material which comprises, longitudinally directing extrudable batch material under pressure through a plurality of delivery passageways, delivering such material from said passageways directly to inner intersecting portions of a plurality of interconnected slots forming a discharge gridwork, simultaneously flowing such longitudinally delivered material in both a lateral and longitudinal direction within said discharge slots to form a coherent gridWork-li'ke mass therewithin, then longitudinally discharging said gridwork-like mass from said slots while simultaneously maintaining opposed surfaces of said gridwork in spaced relation to form a honeycomb structure having a plurality of passages extending therethrough, and rigidifying said honeycomb structure to mainunitary casing thereabout.
References Cited UNITED STATES PATENTS 3,467,570 9/1969 Baxter et al 264177 R 1,874,503 8/1932 Greenwood 425463 3,607,185 9/ 1971 Andrysiak -86 3,668,288 6/ 1872 Takahashi 264209 ROBERT F. WHITE, Primary Examiner T. P. PAVELKO, Assistant Examiner U.S. Cl. X.R.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,790,65 Dated February 5, 197 1- lnventoflsd Rodnev D Bagmv It is certified that error appears in the" above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column 1 line 58, "structures for use in regenerators, recupera-" should be --structure wherein a plurality of elongated thin- --5 Column 5, line 43, "straight-sides" should read --straight-sided--3 Column 6,'line 62, "spirt" should read --spirit--. Y
Signed and sealed this 26th day of Nover nber 1974.
(SEAL) Attest v V McCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Comissioner of Patents ORM PC uscoMM-oc 6O376-F'69 U.S. GOVERNMENT PRINTING OFFICE l9! 0-366334
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837783A (en) * | 1972-10-10 | 1974-09-24 | Corning Glass Works | Extrusion die |
US3873350A (en) * | 1973-02-20 | 1975-03-25 | Corning Glass Works | Method of coating honeycombed substrates |
US3888963A (en) * | 1973-09-18 | 1975-06-10 | Corning Glass Works | In-line homogenizing of extrudable ceramic batch materials |
US3899326A (en) * | 1973-03-30 | 1975-08-12 | Corning Glass Works | Method of making monolithic honeycombed structures |
US3900546A (en) * | 1973-09-18 | 1975-08-19 | Corning Glass Works | Filtering extrusion batch material |
US3930522A (en) * | 1973-05-02 | 1976-01-06 | General Refractories Company | Structural ceramic article and method of making same |
US3958058A (en) * | 1974-07-29 | 1976-05-18 | Corning Glass Works | Ultra-low expansion ceramic articles |
US3983283A (en) * | 1974-03-18 | 1976-09-28 | Corning Glass Works | Honeycombed structures having open-ended cells formed by interconnected walls with longitudinally extending discontinuities |
US3985844A (en) * | 1972-07-14 | 1976-10-12 | Nukem G.M.B.H. | Process for the production of prismatic graphite molded articles for high temperature fuel elements |
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US4042738A (en) * | 1975-07-28 | 1977-08-16 | Corning Glass Works | Honeycomb structure with high thermal shock resistance |
US4041597A (en) * | 1976-08-19 | 1977-08-16 | Corning Glass Works | Method of manufacturing a die for extruding honeycomb articles |
US4075270A (en) * | 1974-12-13 | 1978-02-21 | Corning Glass Works | Extrusion die mask |
US4118456A (en) * | 1977-06-20 | 1978-10-03 | Corning Glass Works | Extrusion die |
US4127691A (en) * | 1977-06-20 | 1978-11-28 | Corning Glass Works | Thermal shock resistant honeycomb structures |
US4131706A (en) * | 1975-12-03 | 1978-12-26 | Graf Ronald E | Sunlight admitting heat impeding panel |
US4135018A (en) * | 1976-08-05 | 1979-01-16 | Corning Glass Works | Thermal shock resistant honeycomb structures |
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US4168944A (en) * | 1976-08-24 | 1979-09-25 | Ngk Spark Plug Co., Ltd. | Apparatus for manufacturing a tubular honeycomb assembly with an adiabatic layer formed integrally on the peripheral wall |
US4180538A (en) * | 1975-02-21 | 1979-12-25 | Ngk Spark Plug Co., Ltd. | Method of making ceramic shaped article from inorganic raw material powder by extrusion molding |
US4259057A (en) * | 1978-12-29 | 1981-03-31 | Saki Chemical Industry Co., Ltd. | Method of continuously extruding and molding ceramic honey-comb shaped moldings and die for use in the continuous extruding operation thereof |
US4271110A (en) * | 1978-09-22 | 1981-06-02 | Ceraver | Method of manufacturing a ceramic unit for indirect heat exchange and a heat exchanger unit obtained thereby |
EP0037281A2 (en) * | 1980-04-02 | 1981-10-07 | Corning Glass Works | Solid fuel burning stove and catalytic converter |
US4295892A (en) * | 1976-04-08 | 1981-10-20 | Ngk Insulators, Ltd. | Cordierite ceramic honeycomb and a method for producing the same |
US4298564A (en) * | 1977-05-04 | 1981-11-03 | Ngk Insulators, Ltd. | Die for extruding a honeycomb structural body and a method of extruding the same |
EP0043694A1 (en) | 1980-07-03 | 1982-01-13 | Corning Glass Works | Particulate filter and material for producing the same |
US4333896A (en) * | 1980-05-12 | 1982-06-08 | Corning Glass Works | Method and apparatus for extruding honeycomb structures with skins thereon involving the use of an adjustable extension die mask |
US4338273A (en) * | 1979-09-06 | 1982-07-06 | Commissariat A L'energie Atomique | Process for the production of alveolar modules |
US4343604A (en) * | 1979-10-15 | 1982-08-10 | Ceraver | Die for extruding ceramic material to form a body of cellular structure, and a method of obtaining said die |
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US4362495A (en) * | 1979-12-12 | 1982-12-07 | Nippon Soken, Inc. | Extrusion device for forming a honeycomb structure |
US4364881A (en) * | 1976-08-10 | 1982-12-21 | Ngk Insulators, Ltd. | Continuous extrusion method of manufacturing ceramic honeycomb structures with the aid of screw type vacuum extruding machine |
US4368025A (en) * | 1980-01-21 | 1983-01-11 | Nippon Soken, Inc. | Extrusion device for producing honeycomb structures |
US4384841A (en) * | 1980-10-31 | 1983-05-24 | Nippon Soken, Inc. | Extrusion die for extruding a honeycomb structure |
EP0083850A2 (en) * | 1982-01-11 | 1983-07-20 | General Motors Corporation | Monolith extrusion die construction method |
US4448828A (en) * | 1980-07-11 | 1984-05-15 | Ngk Insulators, Ltd. | Ceramic honeycomb structural bodies |
US4457685A (en) * | 1982-01-04 | 1984-07-03 | Mobil Oil Corporation | Extrusion die for shaped extrudate |
US4465454A (en) * | 1983-03-29 | 1984-08-14 | Corning Glass Works | Extrusion die |
US4532171A (en) * | 1982-05-03 | 1985-07-30 | Varian Associates, Inc. | Multifiber design for microchannel plates |
US4533584A (en) * | 1983-04-05 | 1985-08-06 | Ngk Insulators, Ltd. | Multi-channel body |
US4557682A (en) * | 1982-02-22 | 1985-12-10 | Corning Glass Works | Apparatus for fabrication of solid particulate filters |
US4591383A (en) * | 1982-09-30 | 1986-05-27 | Corning Glass Works | Apparatus and method of filtering molten metal using honeycomb structure of sintered alumina as filter element |
US4645700A (en) * | 1983-10-07 | 1987-02-24 | Ngk Insulators, Ltd. | Ceramic honeycomb structural body |
US4722819A (en) * | 1986-04-28 | 1988-02-02 | W. R. Grace & Co. | Die and processes for manufacturing honeycomb structures |
DE3726868A1 (en) * | 1986-08-14 | 1988-02-25 | Ngk Insulators Ltd | Mouthpiece for extruding honeycomb bodies and method for producing such mouthpieces |
US4740408A (en) * | 1985-01-21 | 1988-04-26 | Ngk Insulators, Ltd. | Ceramic honeycomb body |
US4743191A (en) * | 1987-04-02 | 1988-05-10 | Allied-Signal Inc. | Multi-piece die for forming honeycomb structures |
US4747986A (en) * | 1986-12-24 | 1988-05-31 | Allied-Signal Inc. | Die and method for forming honeycomb structures |
US4767309A (en) * | 1986-06-17 | 1988-08-30 | Ngk Insulators, Ltd. | Extruding die for forming finned ceramic honeycomb structures |
US4772580A (en) * | 1985-12-27 | 1988-09-20 | Ngk Insulators, Ltd. | Catalyst carrier of cordierite honeycomb structure and method of producing the same |
US4802840A (en) * | 1986-03-26 | 1989-02-07 | Catalysts & Chemicals Industries Co., Ltd. | Die for molding honeycomb structures |
US4812276A (en) * | 1988-04-29 | 1989-03-14 | Allied-Signal Inc. | Stepwise formation of channel walls in honeycomb structures |
EP0307073A1 (en) * | 1987-09-08 | 1989-03-15 | Corning Glass Works | Extrusion die for protrusion and/or high cell density ceramic honeycomb structures |
US4814029A (en) * | 1987-11-06 | 1989-03-21 | Norton Company | Process for making ceramic bodies with open channels |
EP0315292A1 (en) * | 1987-05-22 | 1989-05-10 | Corning Glass Works | Extrusion die for forming thin-walled honeycomb structures |
US4835044A (en) * | 1987-03-14 | 1989-05-30 | Ngk Insulators, Ltd. | Ceramic honeycomb structural bodies |
US4839120A (en) * | 1987-02-24 | 1989-06-13 | Ngk Insulators, Ltd. | Ceramic material extruding method and apparatus therefor |
US4846657A (en) * | 1988-05-02 | 1989-07-11 | Allied-Signal Inc. | Die for extruding ultrafine honeycomb structures |
USRE33013E (en) * | 1983-04-05 | 1989-08-08 | Ngk Insulators, Ltd. | Multi-channel body |
US4871621A (en) * | 1987-12-16 | 1989-10-03 | Corning Incorporated | Method of encasing a structure in metal |
EP0336750A1 (en) * | 1988-04-06 | 1989-10-11 | Ngk Insulators, Ltd. | Extrusion die for forming honeycomb structures |
US4877670A (en) * | 1985-12-27 | 1989-10-31 | Ngk Insulators, Ltd. | Cordierite honeycomb structural body and method of producing the same |
US4883420A (en) * | 1985-12-18 | 1989-11-28 | Ngk Insulators, Ltd. | Die for extruding honeycomb structural bodies |
US4884960A (en) * | 1988-05-06 | 1989-12-05 | Allied-Signal Inc. | Die for extruding and wash coating |
EP0402593A1 (en) * | 1989-06-16 | 1990-12-19 | Hüls Aktiengesellschaft | Extruding head for the extrusion of a ceramic mass into honeycomb structures |
US5053092A (en) * | 1988-03-21 | 1991-10-01 | Corning Incorporated | Method for producing a sinterable extruded laminated article |
US5089203A (en) * | 1991-02-12 | 1992-02-18 | Corning Incorporated | Method and apparatus for forming an outer skin or honeycomb structures |
US5183965A (en) * | 1990-08-03 | 1993-02-02 | Lawless William N | Ceramic superconducting downlead |
US5194719A (en) * | 1992-04-13 | 1993-03-16 | Corning Incorporated | Strengthening and mounting slotted metal honeycomb structures |
US5215690A (en) * | 1990-12-24 | 1993-06-01 | Corning Incorporated | Method of making activated carbon and graphite structures |
US5219667A (en) * | 1991-12-12 | 1993-06-15 | Corning Incorporated | Honeycomb structure and method of forming |
US5219509A (en) * | 1990-11-30 | 1993-06-15 | Corning Incorporated | Method for forming a uniform skin on a cellular substrate |
US5223318A (en) * | 1990-08-06 | 1993-06-29 | Corning Incorporated | Titania substrates and fabrication |
US5223188A (en) * | 1990-10-29 | 1993-06-29 | Corning Incorporated | Stiffening of extrudates with RF energy |
US5238386A (en) * | 1992-05-20 | 1993-08-24 | Corning Incorporated | Multi-part extrusion die |
US5254840A (en) * | 1991-12-12 | 1993-10-19 | Corning Incorporated | Mounting for metal honeycomb structures |
US5256054A (en) * | 1990-11-30 | 1993-10-26 | Corning Incorporated | Method and apparatus for forming a uniform skin on a cellular substrate |
US5281462A (en) * | 1989-11-01 | 1994-01-25 | Corning Incorporated | Material, structure, filter and catalytic converter |
US5303547A (en) * | 1992-04-15 | 1994-04-19 | Amoco Corporation | Emissions control system and method |
US5308556A (en) * | 1993-02-23 | 1994-05-03 | Corning Incorporated | Method of making extrusion dies from powders |
US5316577A (en) * | 1992-02-03 | 1994-05-31 | Corning Incorporated | Plastically deformable metallic mixtures and their use |
US5388345A (en) * | 1993-11-04 | 1995-02-14 | Corning Incorporated | Dielectric drying of metal structures |
US5393586A (en) * | 1992-10-27 | 1995-02-28 | Corning Incorporated | Localized electrical heating of honeycomb structures |
US5403787A (en) * | 1994-02-28 | 1995-04-04 | Corning Incorporated | Extruded ceramic honeycomb and method |
US5409870A (en) * | 1992-11-20 | 1995-04-25 | Corning Incorporated | Modified cordierite precursors |
US5410567A (en) * | 1992-03-05 | 1995-04-25 | Corning Incorporated | Optical fiber draw furnace |
US5429779A (en) * | 1992-11-20 | 1995-07-04 | Corning Incorporated | Method of making cordierite bodies |
US5449541A (en) * | 1992-10-27 | 1995-09-12 | Corning Incorporated | Electrically heatable honeycomb structures |
US5451444A (en) * | 1993-01-29 | 1995-09-19 | Deliso; Evelyn M. | Carbon-coated inorganic substrates |
US5487694A (en) * | 1993-11-12 | 1996-01-30 | Corning Incorporated | Method for shaping honeycomb substrates |
EP0716909A1 (en) | 1994-12-16 | 1996-06-19 | Corning Incorporated | Method and apparatus for extruding large honeycombs |
US5574957A (en) * | 1994-02-02 | 1996-11-12 | Corning Incorporated | Method of encasing a structure in metal |
EP0756339A1 (en) * | 1995-07-26 | 1997-01-29 | Corning Incorporated | Honeycomb battery separator |
US5628975A (en) * | 1989-02-06 | 1997-05-13 | Nippon Shokubai Kagaku Kogyo Co., Ltd. | Method for purifying exhaust gas from a diesel engine |
US5630951A (en) * | 1995-05-15 | 1997-05-20 | Corning Incorporated | Methods and apparatus for making honeycomb extrusion dies |
EP0776743A1 (en) | 1995-11-30 | 1997-06-04 | Corning Incorporated | Honeycomb extrusion die and methods |
EP0776744A1 (en) | 1995-11-30 | 1997-06-04 | Corning Incorporated | Bonded pin extrusion die and method |
WO1998019812A1 (en) * | 1996-11-06 | 1998-05-14 | Materials And Electrochemical Research (Mer) Corporation | Multi-channel structures and processes for making such structures |
EP0859133A1 (en) | 1997-02-12 | 1998-08-19 | Corning Incorporated | Method of making a catalytic converter for use in an internal combustion engine |
US5811048A (en) * | 1996-06-17 | 1998-09-22 | Corning Incorporated | Process of and apparatus for homogenizing a flow stream |
US5820693A (en) * | 1994-01-27 | 1998-10-13 | Patchett; Joseph A. | Process for recovering catalysts supports |
US5861203A (en) * | 1994-06-17 | 1999-01-19 | Wagner Electric Corporation | Reinforced friction material |
US5864743A (en) * | 1996-11-06 | 1999-01-26 | Materials And Electrochemical Research (Mer) Corporation | Multi-channel structures and processes for making structures using carbon filler |
US5865983A (en) * | 1994-11-10 | 1999-02-02 | Corning Incorporated | Process for forming honeycomb extrusion die |
US5866080A (en) * | 1996-08-12 | 1999-02-02 | Corning Incorporated | Rectangular-channel catalytic converters |
US5997720A (en) * | 1997-02-06 | 1999-12-07 | Corning Incorporated | Method for machining extrusion dies |
US6004502A (en) * | 1997-09-02 | 1999-12-21 | Ngk Insulators, Ltd. | Method of firing ceramic honeycomb structural bodies |
US6039908A (en) * | 1996-12-04 | 2000-03-21 | Corning Incorporated | Method for honeycomb extrusion using a corrected flow gradient |
US6080348A (en) * | 1997-10-17 | 2000-06-27 | Corning Incorporated | Modified slot extrusion die |
WO2000037781A1 (en) | 1998-12-18 | 2000-06-29 | Corning Incorporated | A catalytic converter for use in an internal combustion engine and a method of making |
WO2001033100A1 (en) * | 1999-11-02 | 2001-05-10 | Bayer Aktiengesellschaft | Energy absorber for absorbing impact energy |
US6260388B1 (en) | 1998-07-30 | 2001-07-17 | Corning Incorporated | Method of fabricating photonic glass structures by extruding, sintering and drawing |
US6299813B1 (en) | 1999-09-23 | 2001-10-09 | Corning Incorporated | Modified slot extrusion dies |
US6317960B1 (en) | 1999-12-28 | 2001-11-20 | Corning Incorporated | Extrusion die and method of forming |
US6343923B1 (en) | 1999-12-02 | 2002-02-05 | Corning Incorporated | Cellular extrusion die |
US6413072B1 (en) | 1999-12-17 | 2002-07-02 | Corning Incorporated | Extrusion die and methods of forming |
US6428585B1 (en) * | 1999-08-25 | 2002-08-06 | Bi-Patent Holdings, S.A. | Electrochemical cell separator |
US6432249B1 (en) | 1999-12-03 | 2002-08-13 | Corning Inorporated | Extrusion die and method |
US6455124B1 (en) | 2000-12-01 | 2002-09-24 | Corning Incorporated | Method for extruding ceramic honeycombs |
WO2002081973A1 (en) | 2001-04-06 | 2002-10-17 | Realist Technology, Inc. | Clip-mounted catalyst device |
US6478625B2 (en) | 2000-07-11 | 2002-11-12 | Bernard R. Tolmie | Electrical-optical hybrid connector |
EP0472605B2 (en) † | 1989-05-17 | 2003-01-22 | Schedler, Johannes, Dipl.Ing. | Installation and process for heat treatment of waste gases |
US6558151B1 (en) | 1997-06-06 | 2003-05-06 | Corning Incorporated | Low-impedance compound feed extrusion die |
US20030129872A1 (en) * | 2002-01-07 | 2003-07-10 | Tolmie Bernard R. | Hybrid connector system and method |
US20030162883A1 (en) * | 2002-02-28 | 2003-08-28 | Fabian Michelle D. | Particulate sealant for filter plug forming |
US6612857B2 (en) | 2001-07-05 | 2003-09-02 | Bernard R. Tolmie | Electrical connector system and method having optical and/or cooling capability |
US20030221454A1 (en) * | 2001-11-27 | 2003-12-04 | Bowden Bradley F. | EUV lithography glass structures formed by extrusion consolidation process |
US20040045318A1 (en) * | 2002-09-09 | 2004-03-11 | Hrdina Kenneth E. | Method of making silica-titania extreme ultraviolet elements |
US20040150133A1 (en) * | 2003-02-03 | 2004-08-05 | Bernas James J. | Honeycomb extrusion dies |
US20050092166A1 (en) * | 2003-10-31 | 2005-05-05 | Alliant Techsystems Inc. | Propellant extrusion die |
US20050118296A1 (en) * | 2002-03-28 | 2005-06-02 | Ngk Insulators, Ltd. | Honeycomb forming ferrule and jig for honeycomb forming ferrule using the ferrule |
US20050139641A1 (en) * | 2003-12-31 | 2005-06-30 | Frost Rodney I. | Extrusion die and method of constructing same |
US6931097B1 (en) | 1999-07-22 | 2005-08-16 | Corning Incorporated | Extreme ultraviolet soft x-ray projection lithographic method system and lithographic elements |
DE10348501B4 (en) * | 2002-10-22 | 2005-12-08 | Johann Roitner | Shaped body and use of a shaped body |
US6991450B1 (en) | 2004-08-31 | 2006-01-31 | Corning Incorporated | Open cavity extrusion dies |
US20060178769A1 (en) * | 2004-12-09 | 2006-08-10 | Brew Thomas W | Making honeycomb extrusion dies |
EP1452702A3 (en) * | 2003-02-28 | 2006-12-20 | Ngk Insulators, Ltd. | Honeycomb structural body and die for forming honeycomb structural body by extrusion |
US20080124517A1 (en) * | 2006-11-29 | 2008-05-29 | Douglas Munroe Beall | Wall-flow honeycomb filter with hexagonal channel symmetry |
US20080124423A1 (en) * | 2006-11-29 | 2008-05-29 | Richard Curwood Peterson | Extrusion die manufacturing method |
US20080173071A1 (en) * | 2007-01-22 | 2008-07-24 | Park Timothy A | Honeycomb filter defect detecting method |
US20080199369A1 (en) * | 2005-11-16 | 2008-08-21 | Geo2 Technologies, Inc. | Extruded porous substrate and products using the same |
US20080226540A1 (en) * | 2005-09-23 | 2008-09-18 | Mecs, Inc. | Ruthenium Oxide Catalysts for Conversion of Sulfur Dioxide to Sulfur Trioxide |
US20080242530A1 (en) * | 2005-11-16 | 2008-10-02 | Geo2 Technologies, Inc. | Low coefficient of thermal expansion materials including nonstoichiometric cordierite fibers and methods of manufacture |
US20090019831A1 (en) * | 2007-07-19 | 2009-01-22 | Achim Karl-Erich Heibel | Regeneration method for ceramic honeycomb structures |
US20090028982A1 (en) * | 2007-07-24 | 2009-01-29 | Denso Corporation | Extrusion die for molding honeycomb structures |
US20090028979A1 (en) * | 2007-07-24 | 2009-01-29 | Denso Corporation | Honeycomb structure body molding die |
US20090028981A1 (en) * | 2007-07-24 | 2009-01-29 | Denso Corporation | Honeycomb structure body molding die |
WO2009058205A1 (en) | 2007-10-29 | 2009-05-07 | Corning Incorporated | Polymer hybrid membrane structures |
US20090146349A1 (en) * | 2007-12-07 | 2009-06-11 | Atsushi Kidokoro | Method for manufacturing plasma treatment device for exhaust gas purification |
US20100052205A1 (en) * | 2008-08-27 | 2010-03-04 | Thomas William Brew | Method of forming ceramic honeycomb substrates |
CN101683745A (en) * | 2008-09-24 | 2010-03-31 | 日本碍子株式会社 | Joined article and die for forming honeycomb structure |
US20100143520A1 (en) * | 2004-02-27 | 2010-06-10 | Jmp Industries, Inc. | Extruder system and cutting assembly |
WO2010080602A2 (en) | 2008-12-19 | 2010-07-15 | Corning Incorporated | Flow-through substrates and methods for making and using them |
WO2010080613A2 (en) | 2008-12-19 | 2010-07-15 | Corning Incorporated | Coated flow-through substrates and methods for making and using them |
US20100209546A1 (en) * | 2009-02-18 | 2010-08-19 | Ngk Insulators, Ltd. | Die for forming honeycomb structure |
US20110027406A1 (en) * | 2008-03-28 | 2011-02-03 | Hitachi Metals, Ltd. | Die for molding ceramic honeycomb structure |
US7938877B2 (en) | 2005-11-16 | 2011-05-10 | Geo2 Technologies, Inc. | Low coefficient of thermal expansion materials including modified aluminosilicate fibers and methods of manufacture |
WO2012012222A1 (en) | 2010-07-21 | 2012-01-26 | Corning Incorporated | Flow-through substrates and methods for making and using them |
CN102862037A (en) * | 2012-09-17 | 2013-01-09 | 李少荣 | Preparation method of ultralarge high-pore-density honeycomb ceramic mold |
WO2013184759A1 (en) | 2012-06-05 | 2013-12-12 | Corning Incorporated | Methods for preparing polymer membranes on porous supports |
CN104552571A (en) * | 2014-12-02 | 2015-04-29 | 华南理工大学 | Porous honeycomb-shaped biological ceramic, special die and preparation method |
CN105269660A (en) * | 2014-07-09 | 2016-01-27 | 江阴华音陶瓷机电科技有限公司 | Extruding die for honeycomb ceramic filter |
US9889592B2 (en) | 2012-05-29 | 2018-02-13 | Corning Incorporated | Extrusion die with curved face |
US10598068B2 (en) | 2015-12-21 | 2020-03-24 | Emissol, Llc | Catalytic converters having non-linear flow channels |
CN113453842A (en) * | 2019-02-15 | 2021-09-28 | 康宁股份有限公司 | Extrusion die and method of making same |
RU215421U1 (en) * | 2022-09-28 | 2022-12-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева - КАИ" | Composite honeycomb core |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5070156U (en) * | 1973-10-23 | 1975-06-21 | ||
US3950175A (en) * | 1973-11-05 | 1976-04-13 | Corning Glass Works | Pore size control in cordierite ceramic |
JPS528762Y2 (en) * | 1974-05-31 | 1977-02-24 | ||
JPS528761Y2 (en) * | 1974-05-31 | 1977-02-24 | ||
JPS5530594Y2 (en) * | 1974-09-14 | 1980-07-21 | ||
JPS5326857A (en) * | 1976-08-24 | 1978-03-13 | Ngk Spark Plug Co | Method and device for producing tubular honeycomb structure integrally formed with insulating layer on outer periphery |
JPS5638208A (en) * | 1979-09-05 | 1981-04-13 | Nippon Soken | Die for molding honeycomb |
DE3034068C2 (en) * | 1979-09-12 | 1984-10-04 | Nippon Soken, Inc., Nishio, Aichi | Extrusion tool for the production of honeycomb-like profiles, especially as a catalyst carrier, as well as a process for its production |
DE3009611C2 (en) * | 1980-03-13 | 1990-09-13 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Process for the manufacture of waveguide laser bodies |
BR8205832A (en) * | 1982-10-05 | 1984-05-08 | Bruno De Otero Hermany | FIN |
JPS615915A (en) * | 1984-06-19 | 1986-01-11 | Sakai Chem Ind Co Ltd | Continuous extrusion of honeycomb molding and continuous extruding die used therefor |
DE3510181A1 (en) * | 1985-03-21 | 1986-10-02 | Hoechst CeramTec AG, 8672 Selb | EXTRUDING DEVICE FOR PRODUCING HONEYCOMB BODIES |
DE3542332A1 (en) * | 1985-11-29 | 1987-06-04 | Hutschenreuther | METHOD AND DEVICE FOR PRODUCING CHANNELED PRESSINGS FROM POWDER-MOLDED SHAPE, IN PARTICULAR CERAMIC SHAPE KEYWORD: HONEYCOMB |
FI892834A (en) * | 1989-06-08 | 1990-12-09 | Turvakonsultit Oy | FOERFARANDE FOER FRAMSTAELLNING AV EN DOERR SAMT DOERR. |
WO2005011889A1 (en) | 2003-07-30 | 2005-02-10 | Corning Incorporated | Metal honeycomb substrates for chemical and thermal applications |
CN103717365A (en) | 2011-08-11 | 2014-04-09 | 株式会社放电精密加工研究所 | Molding die and method for manufacturing molding die |
DE102015005238A1 (en) | 2015-04-24 | 2016-10-27 | Wolfgang Hölderich | Production of lactams by Beckmann rearrangement of oximes |
US10406729B2 (en) * | 2016-08-29 | 2019-09-10 | The Boeing Company | Compression molding assembly and methods for molding a thermoplastic blocker door |
LU101236B1 (en) * | 2019-05-23 | 2020-11-23 | Phoenix Feinbau Gmbh & Co Kg | Method for producing a component for toolmaking and holding tool for holding a blank and a component |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1050990B (en) * | 1959-02-19 | |||
CA664043A (en) * | 1963-05-28 | A. Maldari Ralph | Macaroni die | |
US1601536A (en) * | 1925-05-09 | 1926-09-28 | Chocolate Sponge Co Inc | Die for extruding candy |
DE535920C (en) * | 1929-04-12 | 1931-10-16 | Hans Letz | Extruded mouthpiece for the production of multi-hole bricks |
US1874503A (en) * | 1930-07-12 | 1932-08-30 | Stephen F Whitman & Son Inc | Extrusion die |
GB549427A (en) * | 1941-10-10 | 1942-11-20 | Harry William Kilby Pears | Improvements in or relating to the production of plastic substances in a foraminous state |
FR931372A (en) * | 1946-07-25 | 1948-02-20 | Device for converting the dough delivered by any press into sheet | |
GB756045A (en) * | 1953-05-20 | 1956-08-29 | British Celanese | Tubular extruded products of thermoplastic film-forming material |
US2908037A (en) * | 1954-03-24 | 1959-10-13 | Multiple Extrusions Inc | Making multiple tube structures by extrusion |
US3038201A (en) * | 1955-12-21 | 1962-06-12 | Multiple Extrusions Inc | Multiple tube extrusion apparatus and method |
GB810924A (en) * | 1956-04-09 | 1959-03-25 | Rudolph Wolfe Miller | Improvements in or relating to making multiple tube structure by extrusion and apparatus therefor |
FR1154853A (en) * | 1956-04-27 | 1958-04-17 | Improvements in processes and devices for manufacturing multitubular parts | |
US3444925A (en) * | 1957-05-07 | 1969-05-20 | Minnesota Mining & Mfg | Structural articles and method of making |
US3038202A (en) * | 1959-01-28 | 1962-06-12 | Multiple Extrusions Inc | Method and apparatus for making multiple tube structures by extrusion |
US2974613A (en) * | 1960-04-25 | 1961-03-14 | Maldarl And Sons Inc D | Macaroni die |
DE1201975B (en) * | 1961-03-09 | 1965-09-30 | Robert Yves Helary | Device for the continuous production of grids or ribbed foils made of plastic |
DE1579011B2 (en) * | 1963-10-05 | 1972-02-10 | Betonkeramik Gmbh, 4018 Langenfeld | METHOD AND DEVICE FOR MANUFACTURING BODIES WITH A COMB-LIKE STRUCTURE |
DE1442653A1 (en) * | 1964-07-21 | 1969-08-28 | Schneider & Co | Catalyst molded body |
AT253406B (en) * | 1964-08-21 | 1967-04-10 | Betonkeramik Gmbh | Device for producing ceramic bodies with a honeycomb structure, and method for producing a sleeve for this device |
CH433087A (en) * | 1965-03-01 | 1967-03-31 | Schneider & Co | Method and device for producing a body with a honeycomb structure |
DE1584324A1 (en) * | 1965-04-15 | 1969-12-18 | Schneider & Co | Device for the production of ceramic bodies |
GB1139827A (en) * | 1965-04-15 | 1969-01-15 | Schneider & Co | Apparatus and methods for producing tubes of fluent viscous material |
DE1442587A1 (en) * | 1965-04-22 | 1968-10-31 | Schneider & Co | Carrier for catalyst materials |
GB1098408A (en) * | 1965-06-24 | 1968-01-10 | Monsanto Chemicals | Extrusion of resins |
US3607185A (en) * | 1968-10-07 | 1971-09-21 | Corning Glass Works | Method for forming multibore tubing |
GB1385907A (en) * | 1971-05-07 | 1975-03-05 | Ici Ltd | Support and catalyst |
US4259057A (en) * | 1978-12-29 | 1981-03-31 | Saki Chemical Industry Co., Ltd. | Method of continuously extruding and molding ceramic honey-comb shaped moldings and die for use in the continuous extruding operation thereof |
-
1971
- 1971-11-09 US US00196986A patent/US3790654A/en not_active Expired - Lifetime
-
1972
- 1972-06-14 BE BE784881A patent/BE784881A/en not_active IP Right Cessation
- 1972-06-15 JP JP5996972A patent/JPS5541908B2/ja not_active Expired
- 1972-06-30 NL NL7209165A patent/NL7209165A/xx active Search and Examination
- 1972-08-09 BR BR005363/72A patent/BR7205363D0/en unknown
- 1972-08-14 SU SU1888060A patent/SU446123A3/en active
- 1972-08-14 SU SU1819947A patent/SU452087A3/en active
- 1972-10-25 IT IT30893/72A patent/IT969876B/en active
- 1972-10-30 AR AR244871A patent/AR195883A1/en active
- 1972-10-30 SE SE7214021A patent/SE382485B/en unknown
- 1972-10-31 CA CA155,239A patent/CA1053446A/en not_active Expired
- 1972-11-03 AU AU48506/72A patent/AU457890B2/en not_active Expired
- 1972-11-08 DE DE2254563A patent/DE2254563C2/en not_active Expired - Lifetime
- 1972-11-08 FR FR7239530A patent/FR2159368B1/fr not_active Expired
- 1972-11-09 GB GB5169072A patent/GB1405618A/en not_active Expired
-
1980
- 1980-01-25 JP JP767780A patent/JPS55123438A/en active Granted
Cited By (217)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985844A (en) * | 1972-07-14 | 1976-10-12 | Nukem G.M.B.H. | Process for the production of prismatic graphite molded articles for high temperature fuel elements |
US3837783A (en) * | 1972-10-10 | 1974-09-24 | Corning Glass Works | Extrusion die |
US3873350A (en) * | 1973-02-20 | 1975-03-25 | Corning Glass Works | Method of coating honeycombed substrates |
US3899326A (en) * | 1973-03-30 | 1975-08-12 | Corning Glass Works | Method of making monolithic honeycombed structures |
US3930522A (en) * | 1973-05-02 | 1976-01-06 | General Refractories Company | Structural ceramic article and method of making same |
US3900546A (en) * | 1973-09-18 | 1975-08-19 | Corning Glass Works | Filtering extrusion batch material |
US3888963A (en) * | 1973-09-18 | 1975-06-10 | Corning Glass Works | In-line homogenizing of extrudable ceramic batch materials |
US3983283A (en) * | 1974-03-18 | 1976-09-28 | Corning Glass Works | Honeycombed structures having open-ended cells formed by interconnected walls with longitudinally extending discontinuities |
US3958058A (en) * | 1974-07-29 | 1976-05-18 | Corning Glass Works | Ultra-low expansion ceramic articles |
US4075270A (en) * | 1974-12-13 | 1978-02-21 | Corning Glass Works | Extrusion die mask |
US4180538A (en) * | 1975-02-21 | 1979-12-25 | Ngk Spark Plug Co., Ltd. | Method of making ceramic shaped article from inorganic raw material powder by extrusion molding |
US4042738A (en) * | 1975-07-28 | 1977-08-16 | Corning Glass Works | Honeycomb structure with high thermal shock resistance |
DE2636031A1 (en) * | 1975-10-07 | 1977-04-21 | Corning Glass Works | EXTRUDING MASK |
US4131706A (en) * | 1975-12-03 | 1978-12-26 | Graf Ronald E | Sunlight admitting heat impeding panel |
US4295892A (en) * | 1976-04-08 | 1981-10-20 | Ngk Insulators, Ltd. | Cordierite ceramic honeycomb and a method for producing the same |
US4135018A (en) * | 1976-08-05 | 1979-01-16 | Corning Glass Works | Thermal shock resistant honeycomb structures |
US4364881A (en) * | 1976-08-10 | 1982-12-21 | Ngk Insulators, Ltd. | Continuous extrusion method of manufacturing ceramic honeycomb structures with the aid of screw type vacuum extruding machine |
US4041597A (en) * | 1976-08-19 | 1977-08-16 | Corning Glass Works | Method of manufacturing a die for extruding honeycomb articles |
US4168944A (en) * | 1976-08-24 | 1979-09-25 | Ngk Spark Plug Co., Ltd. | Apparatus for manufacturing a tubular honeycomb assembly with an adiabatic layer formed integrally on the peripheral wall |
US4298564A (en) * | 1977-05-04 | 1981-11-03 | Ngk Insulators, Ltd. | Die for extruding a honeycomb structural body and a method of extruding the same |
DE2826732A1 (en) * | 1977-06-20 | 1979-01-04 | Corning Glass Works | EXTRUSION FORM |
US4118456A (en) * | 1977-06-20 | 1978-10-03 | Corning Glass Works | Extrusion die |
US4127691A (en) * | 1977-06-20 | 1978-11-28 | Corning Glass Works | Thermal shock resistant honeycomb structures |
DE2847239A1 (en) * | 1977-11-25 | 1979-06-07 | Corning Glass Works | EXTRUDING FORM |
US4271110A (en) * | 1978-09-22 | 1981-06-02 | Ceraver | Method of manufacturing a ceramic unit for indirect heat exchange and a heat exchanger unit obtained thereby |
US4259057A (en) * | 1978-12-29 | 1981-03-31 | Saki Chemical Industry Co., Ltd. | Method of continuously extruding and molding ceramic honey-comb shaped moldings and die for use in the continuous extruding operation thereof |
US4338273A (en) * | 1979-09-06 | 1982-07-06 | Commissariat A L'energie Atomique | Process for the production of alveolar modules |
US4343604A (en) * | 1979-10-15 | 1982-08-10 | Ceraver | Die for extruding ceramic material to form a body of cellular structure, and a method of obtaining said die |
US4362495A (en) * | 1979-12-12 | 1982-12-07 | Nippon Soken, Inc. | Extrusion device for forming a honeycomb structure |
US4368025A (en) * | 1980-01-21 | 1983-01-11 | Nippon Soken, Inc. | Extrusion device for producing honeycomb structures |
EP0037281A3 (en) * | 1980-04-02 | 1981-12-23 | Corning Glass Works | Solid fuel burning stove and catalytic converter |
EP0037281A2 (en) * | 1980-04-02 | 1981-10-07 | Corning Glass Works | Solid fuel burning stove and catalytic converter |
US4333896A (en) * | 1980-05-12 | 1982-06-08 | Corning Glass Works | Method and apparatus for extruding honeycomb structures with skins thereon involving the use of an adjustable extension die mask |
EP0135945A2 (en) | 1980-07-03 | 1985-04-03 | Corning Glass Works | Apparatus for filtering solid particulates |
EP0043694A1 (en) | 1980-07-03 | 1982-01-13 | Corning Glass Works | Particulate filter and material for producing the same |
US4448828A (en) * | 1980-07-11 | 1984-05-15 | Ngk Insulators, Ltd. | Ceramic honeycomb structural bodies |
US4384841A (en) * | 1980-10-31 | 1983-05-24 | Nippon Soken, Inc. | Extrusion die for extruding a honeycomb structure |
DE3141982A1 (en) * | 1980-12-22 | 1982-09-02 | Kabushiki Kaisha Kobe Seiko Sho, Kobe | HONEYCOMB-SHAPED CARBON SHAPED BODY AND METHOD FOR THE PRODUCTION THEREOF |
US4457685A (en) * | 1982-01-04 | 1984-07-03 | Mobil Oil Corporation | Extrusion die for shaped extrudate |
EP0083850A2 (en) * | 1982-01-11 | 1983-07-20 | General Motors Corporation | Monolith extrusion die construction method |
US4486934A (en) * | 1982-01-11 | 1984-12-11 | General Motors Corporation | Monolith extrusion die construction method |
EP0083850A3 (en) * | 1982-01-11 | 1986-03-05 | General Motors Corporation | Monolith extrusion die construction method |
US4557682A (en) * | 1982-02-22 | 1985-12-10 | Corning Glass Works | Apparatus for fabrication of solid particulate filters |
US4532171A (en) * | 1982-05-03 | 1985-07-30 | Varian Associates, Inc. | Multifiber design for microchannel plates |
US4591383A (en) * | 1982-09-30 | 1986-05-27 | Corning Glass Works | Apparatus and method of filtering molten metal using honeycomb structure of sintered alumina as filter element |
US4465454A (en) * | 1983-03-29 | 1984-08-14 | Corning Glass Works | Extrusion die |
US4533584A (en) * | 1983-04-05 | 1985-08-06 | Ngk Insulators, Ltd. | Multi-channel body |
USRE33013E (en) * | 1983-04-05 | 1989-08-08 | Ngk Insulators, Ltd. | Multi-channel body |
US4741792A (en) * | 1983-10-07 | 1988-05-03 | Ngk Insulators, Ltd. | Method of manufacturing a ceramic honeycomb structural body and an extrusion die therefor |
US4645700A (en) * | 1983-10-07 | 1987-02-24 | Ngk Insulators, Ltd. | Ceramic honeycomb structural body |
US4740408A (en) * | 1985-01-21 | 1988-04-26 | Ngk Insulators, Ltd. | Ceramic honeycomb body |
US4883420A (en) * | 1985-12-18 | 1989-11-28 | Ngk Insulators, Ltd. | Die for extruding honeycomb structural bodies |
US5030398A (en) * | 1985-12-27 | 1991-07-09 | Ngk Insulators, Ltd. | Method of producing a cordierite honeycomb structural body |
US4877670A (en) * | 1985-12-27 | 1989-10-31 | Ngk Insulators, Ltd. | Cordierite honeycomb structural body and method of producing the same |
US4772580A (en) * | 1985-12-27 | 1988-09-20 | Ngk Insulators, Ltd. | Catalyst carrier of cordierite honeycomb structure and method of producing the same |
US4802840A (en) * | 1986-03-26 | 1989-02-07 | Catalysts & Chemicals Industries Co., Ltd. | Die for molding honeycomb structures |
US4722819A (en) * | 1986-04-28 | 1988-02-02 | W. R. Grace & Co. | Die and processes for manufacturing honeycomb structures |
US4767309A (en) * | 1986-06-17 | 1988-08-30 | Ngk Insulators, Ltd. | Extruding die for forming finned ceramic honeycomb structures |
DE3726868A1 (en) * | 1986-08-14 | 1988-02-25 | Ngk Insulators Ltd | Mouthpiece for extruding honeycomb bodies and method for producing such mouthpieces |
US4830598A (en) * | 1986-08-14 | 1989-05-16 | Ngk Insulators, Ltd. | Dies for extruding honeycomb structure |
US4875264A (en) * | 1986-08-14 | 1989-10-24 | Ngk Insulators, Ltd. | Method for producing dies for extruding honeycomb structures |
US4747986A (en) * | 1986-12-24 | 1988-05-31 | Allied-Signal Inc. | Die and method for forming honeycomb structures |
US4839120A (en) * | 1987-02-24 | 1989-06-13 | Ngk Insulators, Ltd. | Ceramic material extruding method and apparatus therefor |
US4835044A (en) * | 1987-03-14 | 1989-05-30 | Ngk Insulators, Ltd. | Ceramic honeycomb structural bodies |
US4743191A (en) * | 1987-04-02 | 1988-05-10 | Allied-Signal Inc. | Multi-piece die for forming honeycomb structures |
EP0315292A1 (en) * | 1987-05-22 | 1989-05-10 | Corning Glass Works | Extrusion die for forming thin-walled honeycomb structures |
EP0307073A1 (en) * | 1987-09-08 | 1989-03-15 | Corning Glass Works | Extrusion die for protrusion and/or high cell density ceramic honeycomb structures |
US4902216A (en) * | 1987-09-08 | 1990-02-20 | Corning Incorporated | Extrusion die for protrusion and/or high cell density ceramic honeycomb structures |
US5487863A (en) * | 1987-09-08 | 1996-01-30 | Corning Incorporated | Extrusion die for protrusion and/or high cell density ceramic honeycomb structures |
US4814029A (en) * | 1987-11-06 | 1989-03-21 | Norton Company | Process for making ceramic bodies with open channels |
US4871621A (en) * | 1987-12-16 | 1989-10-03 | Corning Incorporated | Method of encasing a structure in metal |
US5053092A (en) * | 1988-03-21 | 1991-10-01 | Corning Incorporated | Method for producing a sinterable extruded laminated article |
EP0336750A1 (en) * | 1988-04-06 | 1989-10-11 | Ngk Insulators, Ltd. | Extrusion die for forming honeycomb structures |
US4812276A (en) * | 1988-04-29 | 1989-03-14 | Allied-Signal Inc. | Stepwise formation of channel walls in honeycomb structures |
US4846657A (en) * | 1988-05-02 | 1989-07-11 | Allied-Signal Inc. | Die for extruding ultrafine honeycomb structures |
US4884960A (en) * | 1988-05-06 | 1989-12-05 | Allied-Signal Inc. | Die for extruding and wash coating |
US5628975A (en) * | 1989-02-06 | 1997-05-13 | Nippon Shokubai Kagaku Kogyo Co., Ltd. | Method for purifying exhaust gas from a diesel engine |
EP0472605B2 (en) † | 1989-05-17 | 2003-01-22 | Schedler, Johannes, Dipl.Ing. | Installation and process for heat treatment of waste gases |
EP0402593A1 (en) * | 1989-06-16 | 1990-12-19 | Hüls Aktiengesellschaft | Extruding head for the extrusion of a ceramic mass into honeycomb structures |
US5281462A (en) * | 1989-11-01 | 1994-01-25 | Corning Incorporated | Material, structure, filter and catalytic converter |
US5183965A (en) * | 1990-08-03 | 1993-02-02 | Lawless William N | Ceramic superconducting downlead |
US5223318A (en) * | 1990-08-06 | 1993-06-29 | Corning Incorporated | Titania substrates and fabrication |
US5223188A (en) * | 1990-10-29 | 1993-06-29 | Corning Incorporated | Stiffening of extrudates with RF energy |
US5219509A (en) * | 1990-11-30 | 1993-06-15 | Corning Incorporated | Method for forming a uniform skin on a cellular substrate |
US5256054A (en) * | 1990-11-30 | 1993-10-26 | Corning Incorporated | Method and apparatus for forming a uniform skin on a cellular substrate |
US5215690A (en) * | 1990-12-24 | 1993-06-01 | Corning Incorporated | Method of making activated carbon and graphite structures |
US5089203A (en) * | 1991-02-12 | 1992-02-18 | Corning Incorporated | Method and apparatus for forming an outer skin or honeycomb structures |
US5219667A (en) * | 1991-12-12 | 1993-06-15 | Corning Incorporated | Honeycomb structure and method of forming |
US5254840A (en) * | 1991-12-12 | 1993-10-19 | Corning Incorporated | Mounting for metal honeycomb structures |
US5316577A (en) * | 1992-02-03 | 1994-05-31 | Corning Incorporated | Plastically deformable metallic mixtures and their use |
US5410567A (en) * | 1992-03-05 | 1995-04-25 | Corning Incorporated | Optical fiber draw furnace |
US5194719A (en) * | 1992-04-13 | 1993-03-16 | Corning Incorporated | Strengthening and mounting slotted metal honeycomb structures |
US5609832A (en) * | 1992-04-15 | 1997-03-11 | Amoco Corporation | Emissions control system and method |
US5303547A (en) * | 1992-04-15 | 1994-04-19 | Amoco Corporation | Emissions control system and method |
US5660800A (en) * | 1992-04-15 | 1997-08-26 | Amoco Corporation | Emissions control system and method |
US5238386A (en) * | 1992-05-20 | 1993-08-24 | Corning Incorporated | Multi-part extrusion die |
US5449541A (en) * | 1992-10-27 | 1995-09-12 | Corning Incorporated | Electrically heatable honeycomb structures |
US5393586A (en) * | 1992-10-27 | 1995-02-28 | Corning Incorporated | Localized electrical heating of honeycomb structures |
US5409870A (en) * | 1992-11-20 | 1995-04-25 | Corning Incorporated | Modified cordierite precursors |
US5429779A (en) * | 1992-11-20 | 1995-07-04 | Corning Incorporated | Method of making cordierite bodies |
US5597617A (en) * | 1993-01-29 | 1997-01-28 | Corning Incorporated | Carbon-coated inorganic substrates |
US5451444A (en) * | 1993-01-29 | 1995-09-19 | Deliso; Evelyn M. | Carbon-coated inorganic substrates |
US5308556A (en) * | 1993-02-23 | 1994-05-03 | Corning Incorporated | Method of making extrusion dies from powders |
US5388345A (en) * | 1993-11-04 | 1995-02-14 | Corning Incorporated | Dielectric drying of metal structures |
US5487694A (en) * | 1993-11-12 | 1996-01-30 | Corning Incorporated | Method for shaping honeycomb substrates |
US6162524A (en) * | 1994-01-27 | 2000-12-19 | Engelhard Corporation | Process for recovering catalyst |
US5820693A (en) * | 1994-01-27 | 1998-10-13 | Patchett; Joseph A. | Process for recovering catalysts supports |
US5574957A (en) * | 1994-02-02 | 1996-11-12 | Corning Incorporated | Method of encasing a structure in metal |
EP0669294A1 (en) * | 1994-02-28 | 1995-08-30 | Corning Incorporated | Extruded ceramic honeycomb and method |
US5403787A (en) * | 1994-02-28 | 1995-04-04 | Corning Incorporated | Extruded ceramic honeycomb and method |
US5861203A (en) * | 1994-06-17 | 1999-01-19 | Wagner Electric Corporation | Reinforced friction material |
US5865983A (en) * | 1994-11-10 | 1999-02-02 | Corning Incorporated | Process for forming honeycomb extrusion die |
US5552102A (en) * | 1994-12-16 | 1996-09-03 | Corning Incorporated | Method and apparatus for extruding large honeycombs |
EP0716909A1 (en) | 1994-12-16 | 1996-06-19 | Corning Incorporated | Method and apparatus for extruding large honeycombs |
US5630951A (en) * | 1995-05-15 | 1997-05-20 | Corning Incorporated | Methods and apparatus for making honeycomb extrusion dies |
EP0756339A1 (en) * | 1995-07-26 | 1997-01-29 | Corning Incorporated | Honeycomb battery separator |
EP0776744A1 (en) | 1995-11-30 | 1997-06-04 | Corning Incorporated | Bonded pin extrusion die and method |
US5761787A (en) * | 1995-11-30 | 1998-06-09 | Corning Incorporated | Method of making bonded pin extrusion die |
US5964020A (en) * | 1995-11-30 | 1999-10-12 | Corning Incorporated | Bonded pin extrusion die and method |
US5702659A (en) * | 1995-11-30 | 1997-12-30 | Corning Incorporated | Honeycomb extrusion die and methods |
EP0776743A1 (en) | 1995-11-30 | 1997-06-04 | Corning Incorporated | Honeycomb extrusion die and methods |
US5811048A (en) * | 1996-06-17 | 1998-09-22 | Corning Incorporated | Process of and apparatus for homogenizing a flow stream |
US5866080A (en) * | 1996-08-12 | 1999-02-02 | Corning Incorporated | Rectangular-channel catalytic converters |
WO1999039904A1 (en) * | 1996-08-12 | 1999-08-12 | Corning Incorporated | Rectangular-channel catalytic converters |
US5864743A (en) * | 1996-11-06 | 1999-01-26 | Materials And Electrochemical Research (Mer) Corporation | Multi-channel structures and processes for making structures using carbon filler |
WO1998019812A1 (en) * | 1996-11-06 | 1998-05-14 | Materials And Electrochemical Research (Mer) Corporation | Multi-channel structures and processes for making such structures |
US6039908A (en) * | 1996-12-04 | 2000-03-21 | Corning Incorporated | Method for honeycomb extrusion using a corrected flow gradient |
US5997720A (en) * | 1997-02-06 | 1999-12-07 | Corning Incorporated | Method for machining extrusion dies |
EP0859133A1 (en) | 1997-02-12 | 1998-08-19 | Corning Incorporated | Method of making a catalytic converter for use in an internal combustion engine |
US6558151B1 (en) | 1997-06-06 | 2003-05-06 | Corning Incorporated | Low-impedance compound feed extrusion die |
US6004502A (en) * | 1997-09-02 | 1999-12-21 | Ngk Insulators, Ltd. | Method of firing ceramic honeycomb structural bodies |
US6080348A (en) * | 1997-10-17 | 2000-06-27 | Corning Incorporated | Modified slot extrusion die |
US6496632B2 (en) | 1998-07-30 | 2002-12-17 | Corning Incorporated | Method of fabricating photonic structures |
US6260388B1 (en) | 1998-07-30 | 2001-07-17 | Corning Incorporated | Method of fabricating photonic glass structures by extruding, sintering and drawing |
WO2000037781A1 (en) | 1998-12-18 | 2000-06-29 | Corning Incorporated | A catalytic converter for use in an internal combustion engine and a method of making |
USRE41220E1 (en) | 1999-07-22 | 2010-04-13 | Corning Incorporated | Extreme ultraviolet soft x-ray projection lithographic method system and lithographic elements |
US6931097B1 (en) | 1999-07-22 | 2005-08-16 | Corning Incorporated | Extreme ultraviolet soft x-ray projection lithographic method system and lithographic elements |
US6428585B1 (en) * | 1999-08-25 | 2002-08-06 | Bi-Patent Holdings, S.A. | Electrochemical cell separator |
US6299813B1 (en) | 1999-09-23 | 2001-10-09 | Corning Incorporated | Modified slot extrusion dies |
WO2001033100A1 (en) * | 1999-11-02 | 2001-05-10 | Bayer Aktiengesellschaft | Energy absorber for absorbing impact energy |
US6730386B1 (en) | 1999-11-02 | 2004-05-04 | Bayer Aktiengesellschaft | Energy absorber for absorbing impact energy |
US6343923B1 (en) | 1999-12-02 | 2002-02-05 | Corning Incorporated | Cellular extrusion die |
US6432249B1 (en) | 1999-12-03 | 2002-08-13 | Corning Inorporated | Extrusion die and method |
US6413072B1 (en) | 1999-12-17 | 2002-07-02 | Corning Incorporated | Extrusion die and methods of forming |
US6317960B1 (en) | 1999-12-28 | 2001-11-20 | Corning Incorporated | Extrusion die and method of forming |
US6478625B2 (en) | 2000-07-11 | 2002-11-12 | Bernard R. Tolmie | Electrical-optical hybrid connector |
US6455124B1 (en) | 2000-12-01 | 2002-09-24 | Corning Incorporated | Method for extruding ceramic honeycombs |
WO2002081973A1 (en) | 2001-04-06 | 2002-10-17 | Realist Technology, Inc. | Clip-mounted catalyst device |
US6612857B2 (en) | 2001-07-05 | 2003-09-02 | Bernard R. Tolmie | Electrical connector system and method having optical and/or cooling capability |
US6997015B2 (en) | 2001-11-27 | 2006-02-14 | Corning Incorporated | EUV lithography glass structures formed by extrusion consolidation process |
US20030221454A1 (en) * | 2001-11-27 | 2003-12-04 | Bowden Bradley F. | EUV lithography glass structures formed by extrusion consolidation process |
US6821146B2 (en) * | 2002-01-07 | 2004-11-23 | Bernard R. Tolmie | Hybrid connector system and method |
US20030129872A1 (en) * | 2002-01-07 | 2003-07-10 | Tolmie Bernard R. | Hybrid connector system and method |
US6809139B2 (en) | 2002-02-28 | 2004-10-26 | Corning Incorporated | Particulate sealant for filter plug forming |
US20030162883A1 (en) * | 2002-02-28 | 2003-08-28 | Fabian Michelle D. | Particulate sealant for filter plug forming |
US20050118296A1 (en) * | 2002-03-28 | 2005-06-02 | Ngk Insulators, Ltd. | Honeycomb forming ferrule and jig for honeycomb forming ferrule using the ferrule |
US7858007B2 (en) | 2002-03-28 | 2010-12-28 | Ngk Insulators, Ltd. | Honeycomb forming die and jig for honeycomb forming die using the same |
US20080113858A1 (en) * | 2002-03-28 | 2008-05-15 | Ngk Insulators, Ltd. | Honeycomb forming die and jig for honeycomb forming die using the same |
US20040045318A1 (en) * | 2002-09-09 | 2004-03-11 | Hrdina Kenneth E. | Method of making silica-titania extreme ultraviolet elements |
DE10348501B4 (en) * | 2002-10-22 | 2005-12-08 | Johann Roitner | Shaped body and use of a shaped body |
US20040150133A1 (en) * | 2003-02-03 | 2004-08-05 | Bernas James J. | Honeycomb extrusion dies |
US6989119B2 (en) | 2003-02-03 | 2006-01-24 | Corning Incorporated | Honeycomb extrusion dies |
EP1452702A3 (en) * | 2003-02-28 | 2006-12-20 | Ngk Insulators, Ltd. | Honeycomb structural body and die for forming honeycomb structural body by extrusion |
US20050092166A1 (en) * | 2003-10-31 | 2005-05-05 | Alliant Techsystems Inc. | Propellant extrusion die |
US20050139641A1 (en) * | 2003-12-31 | 2005-06-30 | Frost Rodney I. | Extrusion die and method of constructing same |
US7162787B2 (en) | 2003-12-31 | 2007-01-16 | Corning Incorporated | Method for constructing a honeycomb extrusion die |
US8491294B2 (en) | 2004-02-27 | 2013-07-23 | Jmp Industries, Inc. | Extruder system and cutting assembly |
US20100143520A1 (en) * | 2004-02-27 | 2010-06-10 | Jmp Industries, Inc. | Extruder system and cutting assembly |
US8186991B2 (en) | 2004-02-27 | 2012-05-29 | Jmp Industries, Inc. | Extruder system and cutting assembly |
US6991450B1 (en) | 2004-08-31 | 2006-01-31 | Corning Incorporated | Open cavity extrusion dies |
US20060178769A1 (en) * | 2004-12-09 | 2006-08-10 | Brew Thomas W | Making honeycomb extrusion dies |
US7740827B2 (en) | 2005-09-23 | 2010-06-22 | Mecs, Inc. | Ruthenium oxide catalysts for conversion of sulfur dioxide to sulfur trioxide |
US20080226540A1 (en) * | 2005-09-23 | 2008-09-18 | Mecs, Inc. | Ruthenium Oxide Catalysts for Conversion of Sulfur Dioxide to Sulfur Trioxide |
US7938877B2 (en) | 2005-11-16 | 2011-05-10 | Geo2 Technologies, Inc. | Low coefficient of thermal expansion materials including modified aluminosilicate fibers and methods of manufacture |
US20090173687A1 (en) * | 2005-11-16 | 2009-07-09 | Geo2 Technologies, Inc. | Extruded Porous Substrate and Products Using The Same |
US20080242530A1 (en) * | 2005-11-16 | 2008-10-02 | Geo2 Technologies, Inc. | Low coefficient of thermal expansion materials including nonstoichiometric cordierite fibers and methods of manufacture |
US7862641B2 (en) | 2005-11-16 | 2011-01-04 | Geo2 Technologies, Inc. | Extruded porous substrate and products using the same |
US8057568B2 (en) * | 2005-11-16 | 2011-11-15 | Geo2 Technologies, Inc. | Extruded porous substrate and products using the same |
US20090136709A1 (en) * | 2005-11-16 | 2009-05-28 | Bilal Zuberi | Extruded Porous Substrate having Inorganic Bonds |
US20080199369A1 (en) * | 2005-11-16 | 2008-08-21 | Geo2 Technologies, Inc. | Extruded porous substrate and products using the same |
US7901480B2 (en) | 2005-11-16 | 2011-03-08 | Geo2 Technologies, Inc. | Extruded porous substrate having inorganic bonds |
US7938876B2 (en) * | 2005-11-16 | 2011-05-10 | GE02 Technologies, Inc. | Low coefficient of thermal expansion materials including nonstoichiometric cordierite fibers and methods of manufacture |
US7807250B2 (en) | 2006-11-29 | 2010-10-05 | Corning Incorporated | Wall-flow honeycomb filter with hexagonal channel symmetry |
US20080124423A1 (en) * | 2006-11-29 | 2008-05-29 | Richard Curwood Peterson | Extrusion die manufacturing method |
WO2008066795A3 (en) * | 2006-11-29 | 2008-09-12 | Corning Inc | Wall-flow honeycomb filter with hexagonal channel symmetry |
US20080124517A1 (en) * | 2006-11-29 | 2008-05-29 | Douglas Munroe Beall | Wall-flow honeycomb filter with hexagonal channel symmetry |
US20080173071A1 (en) * | 2007-01-22 | 2008-07-24 | Park Timothy A | Honeycomb filter defect detecting method |
US20090019831A1 (en) * | 2007-07-19 | 2009-01-22 | Achim Karl-Erich Heibel | Regeneration method for ceramic honeycomb structures |
US7980065B2 (en) | 2007-07-19 | 2011-07-19 | Corning Incorporated | Regeneration method for ceramic honeycomb structures |
US20090028981A1 (en) * | 2007-07-24 | 2009-01-29 | Denso Corporation | Honeycomb structure body molding die |
US7637731B2 (en) * | 2007-07-24 | 2009-12-29 | Denso Corporation | Honeycomb structure body molding die |
US20090028982A1 (en) * | 2007-07-24 | 2009-01-29 | Denso Corporation | Extrusion die for molding honeycomb structures |
US20090028979A1 (en) * | 2007-07-24 | 2009-01-29 | Denso Corporation | Honeycomb structure body molding die |
WO2009058205A1 (en) | 2007-10-29 | 2009-05-07 | Corning Incorporated | Polymer hybrid membrane structures |
US20090146349A1 (en) * | 2007-12-07 | 2009-06-11 | Atsushi Kidokoro | Method for manufacturing plasma treatment device for exhaust gas purification |
US8282385B2 (en) * | 2008-03-28 | 2012-10-09 | Hitachi Metals, Ltd. | Die for molding ceramic honeycomb structure |
US20110027406A1 (en) * | 2008-03-28 | 2011-02-03 | Hitachi Metals, Ltd. | Die for molding ceramic honeycomb structure |
US20100052205A1 (en) * | 2008-08-27 | 2010-03-04 | Thomas William Brew | Method of forming ceramic honeycomb substrates |
CN101683745A (en) * | 2008-09-24 | 2010-03-31 | 日本碍子株式会社 | Joined article and die for forming honeycomb structure |
CN101683745B (en) * | 2008-09-24 | 2014-05-07 | 日本碍子株式会社 | Joined article and joint for forming honeycomb structure |
WO2010080613A2 (en) | 2008-12-19 | 2010-07-15 | Corning Incorporated | Coated flow-through substrates and methods for making and using them |
EP2367629A2 (en) * | 2008-12-19 | 2011-09-28 | Corning Incorporated | Coated flow-through substrates and methods for making and using them |
WO2010080602A2 (en) | 2008-12-19 | 2010-07-15 | Corning Incorporated | Flow-through substrates and methods for making and using them |
US20100209546A1 (en) * | 2009-02-18 | 2010-08-19 | Ngk Insulators, Ltd. | Die for forming honeycomb structure |
US8398390B2 (en) * | 2009-02-18 | 2013-03-19 | Ngk Insulators, Ltd. | Die for forming honeycomb structure |
EP2221156A3 (en) * | 2009-02-18 | 2013-03-27 | NGK Insulators, Ltd. | Die for forming honeycomb structure |
WO2012012222A1 (en) | 2010-07-21 | 2012-01-26 | Corning Incorporated | Flow-through substrates and methods for making and using them |
US9889592B2 (en) | 2012-05-29 | 2018-02-13 | Corning Incorporated | Extrusion die with curved face |
WO2013184759A1 (en) | 2012-06-05 | 2013-12-12 | Corning Incorporated | Methods for preparing polymer membranes on porous supports |
CN102862037A (en) * | 2012-09-17 | 2013-01-09 | 李少荣 | Preparation method of ultralarge high-pore-density honeycomb ceramic mold |
CN105269660A (en) * | 2014-07-09 | 2016-01-27 | 江阴华音陶瓷机电科技有限公司 | Extruding die for honeycomb ceramic filter |
CN105269660B (en) * | 2014-07-09 | 2017-08-15 | 江阴华音陶瓷机电科技有限公司 | A kind of ceramic honeycomb filter extrusion die |
CN104552571A (en) * | 2014-12-02 | 2015-04-29 | 华南理工大学 | Porous honeycomb-shaped biological ceramic, special die and preparation method |
US10598068B2 (en) | 2015-12-21 | 2020-03-24 | Emissol, Llc | Catalytic converters having non-linear flow channels |
US10815856B2 (en) | 2015-12-21 | 2020-10-27 | Mansour Masoudi | Catalytic converters having non-linear flow channels |
CN113453842A (en) * | 2019-02-15 | 2021-09-28 | 康宁股份有限公司 | Extrusion die and method of making same |
RU215421U1 (en) * | 2022-09-28 | 2022-12-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева - КАИ" | Composite honeycomb core |
Also Published As
Publication number | Publication date |
---|---|
SU452087A3 (en) | 1974-11-30 |
SU446123A3 (en) | 1974-10-05 |
JPS4855960A (en) | 1973-08-06 |
JPS5541908B2 (en) | 1980-10-27 |
AU457890B2 (en) | 1975-02-13 |
GB1405618A (en) | 1975-09-10 |
JPS5761592B2 (en) | 1982-12-24 |
BR7205363D0 (en) | 1973-07-19 |
DE2254563A1 (en) | 1973-05-17 |
FR2159368A1 (en) | 1973-06-22 |
NL7209165A (en) | 1973-05-11 |
DE2254563C2 (en) | 1990-08-02 |
AR195883A1 (en) | 1973-11-15 |
CA1053446A (en) | 1979-05-01 |
JPS55123438A (en) | 1980-09-22 |
SE382485B (en) | 1976-02-02 |
FR2159368B1 (en) | 1975-11-07 |
AU4850672A (en) | 1974-05-16 |
BE784881A (en) | 1972-12-14 |
IT969876B (en) | 1974-04-10 |
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